Findings:
Unchanged to the previous study a nodular, 4 mm measuring, homogeneously enhancing lesion is seen located at the right internal auditory meatus in the right cerebellopontine angle without any mass effect. No abnormality is seen on the left side.
Known callosal dysgenesis. Absent vermis and failure of cleavage of the two cerebellar hemispheres – appearance of rhombencephalosynapsis.
Left parietal VP shunt with its tip located posterior to the left lateral ventricle. No hydrocephalus.
Mucosal thickening is seen in the left sphenoid sinus. The paranasal sinuses are otherwise clear. Partial obliteration of the mastoid air cells on the left side is seen.
Conclusion:
Stable appearance of the small right vestibular schwannoma.
Known callosal dysgenesis and rhombencephalosynapsis.